TITLE:   GCN CIRCULAR
NUMBER:  24198
SUBJECT: LIGO/Virgo S190425z: KPED Follow-Up Observations
DATE:    19/04/25 21:54:41 GMT
FROM:    Tomas Ahumada at U. of Maryland  <tahumada@astro.umd.edu>

Authors: Tomas Ahumada (UMD), Michael W. Coughlin (Caltech), Kai Staats
(Embry-Riddle University),  Richard G. Dekany
<https://arxiv.org/search/astro-ph?searchtype=author&query=Dekany%2C+R+G>
(Caltech), Dmitry A. Duev
<https://arxiv.org/search/astro-ph?searchtype=author&query=Duev%2C+D+A>
(Caltech), Michael Feeney
<https://arxiv.org/search/astro-ph?searchtype=author&query=Feeney%2C+M>
(Caltech), S. R. Kulkarni
<https://arxiv.org/search/astro-ph?searchtype=author&query=Kulkarni%2C+S+R>
(Caltech), Reed Riddle
<https://arxiv.org/search/astro-ph?searchtype=author&query=Riddle%2C+R>
(Caltech) on behalf of the KPED team and the Global Relay of Observatories
Watching Transients Happen (GROWTH) collaboration.

We used the Kitt Peak EMCCD Demonstrator (KPED) on the Kitt Peak 84-inch
telescope (Coughlin et al 2019b) to obtain 300 s r-band images for 10
galaxies in the 90% localization region of the S190425z LIGO/Virgo
detection (GCN 24168). The observations started 10:12 UT on 2019 April 25
(about ~1.9 hours after the event) and the median 5 sigma upper limit for
an isolated point source in our images was r > 20.8. No transients were
detected in any of the galaxies listed below:

           Name             |         R.A. |       Dec.

------------------------------------------------------------------------


NGC6166                       | 16:28:38.23 | 39:33:04.4

NGC4889                       | 13:00:08.13 | 27:58:37.2

CB-11.4459                     15:18:32.09  |  31:09:40.82

1200-07486009              | 15:12:12.73 |  31:54:36.17

J15122693+3224040
<http://simbad.u-strasbg.fr/simbad/sim-id?Ident=%4012318336&Name=2MASX%20J15122693%2b3224040&submit=submit>
    | 15:12:26.92 |  32:24:03.84

J151717.32+304801.3   | 15:17:17.33 |  30:48:01.33

J151303.42+325505.8   | 15:13:03.43 |  32:55:05.81

J15120209+3254551
<http://simbad.u-strasbg.fr/simbad/sim-id?Ident=%402909607&Name=2MASX%20J15120209%2b3254551&submit=submit>
    | 15:12:02.07 | 32:54:55.29

J15113637+3142477
<http://simbad.u-strasbg.fr/simbad/sim-id?Ident=%4011050786&Name=2MASX%20J15113637%2b3142477&submit=submit>
    | 15:11:36.34  | 31:42:47.31

J151109.81+313833.2   | 15:11:09.82  | 31:38:33.2


The KPED team thanks the National Science Foundation, the National Optical
Astronomical Observatory and the Murty family for support in the building
and operation of KPED.